linux-kernel - Re: [PATCH 06/20] media: m88ds3103: drop reg11 calculus from m88ds3103b_select

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Date:   Fri, 26 Nov 2021 12:40:38 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Antti Palosaari <crope@....fi>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH 06/20] media: m88ds3103: drop reg11 calculus from
 m88ds3103b_select_mclk()

On Wed, Nov 24, 2021 at 08:13:09PM +0100, Mauro Carvalho Chehab wrote:
> This vaklue is never used at the code. So, drop it.

       ^ value

> Solves a W=1 clang warning.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

I would expect GCC to warn about this as well.

> ---
> 
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 00/20] at: https://lore.kernel.org/all/cover.1637781097.git.mchehab+huawei@kernel.org/
> 
>  drivers/media/dvb-frontends/m88ds3103.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c
> index 02e8aa11e36e..bce0f42f3d19 100644
> --- a/drivers/media/dvb-frontends/m88ds3103.c
> +++ b/drivers/media/dvb-frontends/m88ds3103.c
> @@ -451,7 +451,7 @@ static int m88ds3103b_select_mclk(struct m88ds3103_dev *dev)
>  
>  static int m88ds3103b_set_mclk(struct m88ds3103_dev *dev, u32 mclk_khz)
>  {
> -	u8 reg11 = 0x0A, reg15, reg16, reg1D, reg1E, reg1F, tmp;
> +	u8 reg15, reg16, reg1D, reg1E, reg1F, tmp;
>  	u8 sm, f0 = 0, f1 = 0, f2 = 0, f3 = 0;
>  	u16 pll_div_fb, N;
>  	u32 div;
> @@ -480,8 +480,6 @@ static int m88ds3103b_set_mclk(struct m88ds3103_dev *dev, u32 mclk_khz)
>  	div /= mclk_khz;
>  
>  	if (dev->cfg->ts_mode == M88DS3103_TS_SERIAL) {
> -		reg11 |= 0x02;
> -
>  		if (div <= 32) {
>  			N = 2;
>  
> @@ -532,8 +530,6 @@ static int m88ds3103b_set_mclk(struct m88ds3103_dev *dev, u32 mclk_khz)
>  		else if ((f3 < 8) && (f3 != 0))
>  			f3 = 8;
>  	} else {
> -		reg11 &= ~0x02;
> -
>  		if (div <= 32) {
>  			N = 2;
>  
> -- 
> 2.33.1
> 
>